Alright, let's solve this math problem step by step. First, we have the number 558. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 138. So, we're going to take the number 558 and add it to itself 138 times.
Step 1: 0 + 558 = 558
Step 2: 558 + 558 = 1116
Step 3: 1116 + 558 = 1674
Step 4: 1674 + 558 = 2232
Step 5: 2232 + 558 = 2790
Step 6: 2790 + 558 = 3348
Step 7: 3348 + 558 = 3906
Step 8: 3906 + 558 = 4464
Step 9: 4464 + 558 = 5022
Step 10: 5022 + 558 = 5580
Step 11: 5580 + 558 = 6138
Step 12: 6138 + 558 = 6696
Step 13: 6696 + 558 = 7254
Step 14: 7254 + 558 = 7812
Step 15: 7812 + 558 = 8370
Step 16: 8370 + 558 = 8928
Step 17: 8928 + 558 = 9486
Step 18: 9486 + 558 = 10044
Step 19: 10044 + 558 = 10602
Step 20: 10602 + 558 = 11160
Step 21: 11160 + 558 = 11718
Step 22: 11718 + 558 = 12276
Step 23: 12276 + 558 = 12834
Step 24: 12834 + 558 = 13392
Step 25: 13392 + 558 = 13950
Step 26: 13950 + 558 = 14508
Step 27: 14508 + 558 = 15066
Step 28: 15066 + 558 = 15624
Step 29: 15624 + 558 = 16182
Step 30: 16182 + 558 = 16740
Step 31: 16740 + 558 = 17298
Step 32: 17298 + 558 = 17856
Step 33: 17856 + 558 = 18414
Step 34: 18414 + 558 = 18972
Step 35: 18972 + 558 = 19530
Step 36: 19530 + 558 = 20088
Step 37: 20088 + 558 = 20646
Step 38: 20646 + 558 = 21204
Step 39: 21204 + 558 = 21762
Step 40: 21762 + 558 = 22320
Step 41: 22320 + 558 = 22878
Step 42: 22878 + 558 = 23436
Step 43: 23436 + 558 = 23994
Step 44: 23994 + 558 = 24552
Step 45: 24552 + 558 = 25110
Step 46: 25110 + 558 = 25668
Step 47: 25668 + 558 = 26226
Step 48: 26226 + 558 = 26784
Step 49: 26784 + 558 = 27342
Step 50: 27342 + 558 = 27900
Step 51: 27900 + 558 = 28458
Step 52: 28458 + 558 = 29016
Step 53: 29016 + 558 = 29574
Step 54: 29574 + 558 = 30132
Step 55: 30132 + 558 = 30690
Step 56: 30690 + 558 = 31248
Step 57: 31248 + 558 = 31806
Step 58: 31806 + 558 = 32364
Step 59: 32364 + 558 = 32922
Step 60: 32922 + 558 = 33480
Step 61: 33480 + 558 = 34038
Step 62: 34038 + 558 = 34596
Step 63: 34596 + 558 = 35154
Step 64: 35154 + 558 = 35712
Step 65: 35712 + 558 = 36270
Step 66: 36270 + 558 = 36828
Step 67: 36828 + 558 = 37386
Step 68: 37386 + 558 = 37944
Step 69: 37944 + 558 = 38502
Step 70: 38502 + 558 = 39060
Step 71: 39060 + 558 = 39618
Step 72: 39618 + 558 = 40176
Step 73: 40176 + 558 = 40734
Step 74: 40734 + 558 = 41292
Step 75: 41292 + 558 = 41850
Step 76: 41850 + 558 = 42408
Step 77: 42408 + 558 = 42966
Step 78: 42966 + 558 = 43524
Step 79: 43524 + 558 = 44082
Step 80: 44082 + 558 = 44640
Step 81: 44640 + 558 = 45198
Step 82: 45198 + 558 = 45756
Step 83: 45756 + 558 = 46314
Step 84: 46314 + 558 = 46872
Step 85: 46872 + 558 = 47430
Step 86: 47430 + 558 = 47988
Step 87: 47988 + 558 = 48546
Step 88: 48546 + 558 = 49104
Step 89: 49104 + 558 = 49662
Step 90: 49662 + 558 = 50220
Step 91: 50220 + 558 = 50778
Step 92: 50778 + 558 = 51336
Step 93: 51336 + 558 = 51894
Step 94: 51894 + 558 = 52452
Step 95: 52452 + 558 = 53010
Step 96: 53010 + 558 = 53568
Step 97: 53568 + 558 = 54126
Step 98: 54126 + 558 = 54684
Step 99: 54684 + 558 = 55242
Step 100: 55242 + 558 = 55800
Step 101: 55800 + 558 = 56358
Step 102: 56358 + 558 = 56916
Step 103: 56916 + 558 = 57474
Step 104: 57474 + 558 = 58032
Step 105: 58032 + 558 = 58590
Step 106: 58590 + 558 = 59148
Step 107: 59148 + 558 = 59706
Step 108: 59706 + 558 = 60264
Step 109: 60264 + 558 = 60822
Step 110: 60822 + 558 = 61380
Step 111: 61380 + 558 = 61938
Step 112: 61938 + 558 = 62496
Step 113: 62496 + 558 = 63054
Step 114: 63054 + 558 = 63612
Step 115: 63612 + 558 = 64170
Step 116: 64170 + 558 = 64728
Step 117: 64728 + 558 = 65286
Step 118: 65286 + 558 = 65844
Step 119: 65844 + 558 = 66402
Step 120: 66402 + 558 = 66960
Step 121: 66960 + 558 = 67518
Step 122: 67518 + 558 = 68076
Step 123: 68076 + 558 = 68634
Step 124: 68634 + 558 = 69192
Step 125: 69192 + 558 = 69750
Step 126: 69750 + 558 = 70308
Step 127: 70308 + 558 = 70866
Step 128: 70866 + 558 = 71424
Step 129: 71424 + 558 = 71982
Step 130: 71982 + 558 = 72540
Step 131: 72540 + 558 = 73098
Step 132: 73098 + 558 = 73656
Step 133: 73656 + 558 = 74214
Step 134: 74214 + 558 = 74772
Step 135: 74772 + 558 = 75330
Step 136: 75330 + 558 = 75888
Step 137: 75888 + 558 = 76446
Step 138: 76446 + 558 = 77004

So, 558*138 = 77004